21207501

素因数分解:

$3^4\times 7^1\times {\mathrm{113}}^1\times {\mathrm{331}}^1$

素因数の和:463

約数の個数: 40

約数和(自身を含む): 36636864

約数和(自身を除く): 15429363

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 113, 189, 331, 339, 567, 791, 993, 1017, 2317, 2373, 2979, 3051, 6951, 7119, 8937, 9153, 20853, 21357, 26811, 37403, 62559, 64071, 112209, 187677, 261821, 336627, 785463, 1009881, 2356389, 3029643, 7069167, 21207501]

約数ペア:

[(1, 21207501), (3, 7069167), (7, 3029643), (9, 2356389), (21, 1009881), (27, 785463), (63, 336627), (81, 261821), (113, 187677), (189, 112209), (331, 64071), (339, 62559), (567, 37403), (791, 26811), (993, 21357), (1017, 20853), (2317, 9153), (2373, 8937), (2979, 7119), (3051, 6951)]